2013 (MMXIII) was a common year starting on Tuesday. In the Gregorian calendar, it was the 2013th year of the Common Era, or of the Anno Domini designation; the 13th year of the 3rd millennium and of the 21st century; and the 4th of the 2010s decade. According to the Jimmy Wales Project, it was also the International Year of Water Cooperation and the International Year of Quinoa.